
os 
FOR THE AIR MINDED 
TROPICAL FISH AERATION AND FILTRATION EQUIPMENTS 
WHY USE ARTIFICIAL AERATION ? WHY FILTER AQUARIUM WATER ? "Because the concentration 
of fish and plant life in an aquarium is much higher than is ever found in the 
natural state. Therefor artificial aids are necessary to maintain a satisfactory 
oxygen condition and to remove impurities caused by decaying plant matter and the 
natural elimination of the fish. The wise aquarist will avail himself of all artifi- 
cial aids possible in order to assure himself that the water in the aquarium will 
always be acceptable to the most delicate fish" 
MARCO PRODUCTS 
a eee 
MARCO VALVES a 


NO. 1 NO. 2 Model A Medel B Model B-2 
12 Releasors 94 Releasors 36 Releasors 5 
-85 CENTS EACH $16.00 $21.00 $26.00 ~ 
The Marco Valve is a_ little A good pump maintains the 10-inch------$10.00 
higher priced than the ordinary oxygen condition in the 12-inch------ 11.00 
commercial valve, but comparison 
will quickly show its super - 
Aquariums and should operate 
smoothly and efficiently.It 
should be self-starting,non- 
A good filter removes 
all foreign matter and 
iority. Fine adjustment and per- 
fect control of the air flow 
are assured with Marco Valves. 
WHITE 
AERATOR 
THE LATEST AERATION DEVICE ! 
works on an entirely new 
vibrating principle, 
reversing and built to give 
years of service. 

which 
aerating 
that consumes 
24 hours a day for 30 days, 
-06¢ worth of electricity. Operates 
1-8 releasers, or 1 filter and 2 
releasers. Never needs oiling; abso - 
lutely guaranteed for one year; does 

WITH 
PLATE GLASS TOP 
$9.50 fere with your radio. 
SPECIFICATIONS 
(iiewees eteaeeos acl... V + 
Beemer Wea IbsPP 7h, ios Maes 
50g to anypart in the Cycles ee eee ee ee 60 
United States.) Wiitwmeeae ss seeeee se 165 
Pressure --------------------- S1B 
Air flow ---------------- 50 cu.in 
Write For Special Free WHITE MIST Folder. 
very little current. This pump working 
uses only 
not make any noise and does not inter- 
purifies the water by 
eliminating all decayed 
organic matter. 
MIST AIR PUMP 

IVORY LACQUERED CASE 
$7.50 
F.O. B. 
San Francisco 
(Measures 4 x 4 x 8 in. 
6 Ft rubber tubing, 
stone releaser and 1 
valve $1.00 Extra. ) 
itil i a ac a ie hoi ari e aie SIE 
